Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
  • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
  • C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
  • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
  • C07D401/06—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
  • A61K31/47—Quinolines; Isoquinolines
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P9/00—Drugs for disorders of the cardiovascular system
  • A61P9/08—Vasodilators for multiple indications

Definitions

• the present invention relates to peripheral vasodilators each comprising a carbostyril derivative as an active ingredient, as well as to novel carbostyril derivatives having an excellent peripheral vasodilating activity.
• R is a group of the formula:
• Rl 1 is a group of the formula: -NR4'R5' or the like; R2" is a hydrogen atom or a lower alkyl group; and R3' is a hydrogen atom, a lower alkyl group or the like)] have a myocardial contraction increasing activity, a coronary blood flow increasing activity, a hypotensive activity, a norepinephrin vasocontraction inhibitory effect and an anti-inflammatory effect and are useful as a cardiotonic for treating various heart diseases, an anti-hyperten ⁇ sive agent and an anti-inflammatory agent. It is not known, however, that such carbostyril derivatives have a peripheral vasodilating activity.
• carbostyril derivatives disclosed in the above-mentioned prior art references indeed possess certain pharmacological activities, for example yocardial contraction increasing activity (positive inotropic activity) , coronary blood flow increasing activity, hypotensive activity and antiinflammatory activity, etc.
• yocardial contraction increasing activity positive inotropic activity
• coronary blood flow increasing activity a blood flow increasing activity
• hypotensive activity a blood flow increasing activity
• antiinflammatory activity etc.
• carbostyril derivatives do not possess any peripheral vasodilating activities at all.
• the present inventors synthesized a number of carbostyril derivatives and examined their pharmaco ⁇ logical activities. As a result, the present inventors found that each of the carbostyril derivatives represented by the following general formula (1) and their salts
• Rl represents a hydrogen atom or a lower alkyl group
• R 2 and R 3 which may be the same or different, each represent a hydrogen atom, a lower alkyl group, a phenylthio-lower alkyl group, a phenoxy-lower alkyl group which may have, on the phenyl ring, 1-3 substi ⁇ tuents selected from the group consisting of halogen atoms and lower alkoxy groups, or a phenyl-lower alkyl group
• R4 represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a nitro group, an amino group or a phenyl-lower alkylamino group
• the carbon-carbon bond between 3- and 4-positions in the carbostyril skeleton represents a single bond or a double bond
• the present inventors further found that, among the carbosty
• R 1A represents a hydrogen atom or a lower alkyl group
• R2A and 3A which may be the same or different, each represent a hydrogen atom, a lower alkyl group, a phenylthio-lower alkyl group, a phenoxy-lower alkyl group having, on the phenyl ring, 1-3 substituents selected from the group consisting of halogen atoms and lower alkoxy groups, or a phenyl-lower alkyl group
• R 4A repre ⁇ sents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a nitro group, an amino group or a phenyl- lower alkylamino group
• the carbon-carbon bond between 3- and 4-positions in the carbostyril skeleton represents a single bond or a double bond
• neither R2A nor R3A must be any of a hydrogen atom, a lower alkyl group and a phenyl-lower
• bonds to the 6-position of the carbostyril skeleton are novel substances and are useful as a peripheral vasodilator.
• each of the carbostyril derivatives of general formula (1) and general formula (1A) [these two general formulas are hereinafter referred to simply as general formula (1)] and their salts has an excellent peripheral vasodilating activity, is useful as an agent for improving peripheral circulatory disturbances caused by arterial diseases (e.g. Berger disease, obstructive arteriosclerosis, Raynaud disease and Raynaud syndrome), venous diseases (e.g. venous thrombosis and thrombophlebites) and other diseases (e.g.
• arterial diseases e.g. Berger disease, obstructive arteriosclerosis, Raynaud disease and Raynaud syndrome
• venous diseases e.g. venous thrombosis and thrombophlebites
• other diseases e.g.
• (1) and their salts according to the present invention are characterized particularly in that while they have an excellent peripheral vasodilating activity, they show low pharmacological side-effects to the heart, i.e. a low effect to heart rate, a low hypotensive effect and a low myocardial contraction effect.
• “Lower alkyl group” can be exemplified by C ⁇ - 6 straight- or branched-chain alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, tert-butyl, pentyl and hexyl groups and the like.
• Phenylthio-lower alkyl group can be exempli ⁇ fied by phenylthioalkyl groups in which the alkyl moiety is a C ⁇ - 6 straight- or branched-chain alkyl group, such as phenylthiomethyl, 2-phenylthioethyl, 1-phenylthioethyl, 3-phenylthiopropyl, 4-phenylthiobutyl, l,l-dimethyl-2- phenylthioethyl, 5-phenylthiopentyl, 6-phenylthiohexyl and 2-methyl-3-phenylthiopropyl groups and the like.
• “Lower alkoxy group” can be exemplified by C ⁇ _ 6 straight- or branched-chain alkoxy groups such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, tert- butoxy, pentyloxy and hexyloxy groups and the like.
• Phenyl-lower alkyl group can be exemplified by phenylalkyl groups in which the alkyl moiety is a C ⁇ - 6 straight- or branched-chain alkyl group, such as benzyl, 2-phenylethyl, 1-phenylethyl, 3-phenylpropyl, 4-phenyl- butyl, l,l-dimethyl-2-phenylethyl, 5-phenylpentyl, 6- phenylhexyl and 2-methyl-3-phenylpropyl groups and the like.
• Phenyl-lower alkylamino group can be exemplified by phenylalkylamino groups in which the alkyl moiety is a C ⁇ _ 6 straight- or branched-chain alkyl group, such as benzylamino, (2-phenylethyl)amino, (1-phenyl- ethyl)amino, (3-phenyl- propyl)amino, (4-phenylbutyl)- amino, (l,l-dimethyl-2-phenylethyl)amino, (5-phenyl- pentyl)amino, (6-phenylhexyl)amino and (2-methyl-3- phenylpropyl)amino group and the like.
• Halogen atom can be exemplified by a fluorine atom, a chlorine atom, a bromine atom, an iodine atom and the like .
• Phenoxy-lower alkyl group having, on the phenyl ring, 1-3 substituents selected from the group consisting of halogen atoms and lower alkoxy groups can be exemplified by phenoxyalkyl groups which each have, on the phenyl ring, 1-3 substituents selected from halogen atoms and C ⁇ _ 6 straight- or branched-chain alkoxy groups in which the lower alkyl moiety is a C - ⁇ straight- or branched-chain alkyl group, such as (2- chlorophenoxy)methyl, l-(3-chlorophenoxy)ethyl, 2-(4- chlorophenoxy)ethyl, 3-(4-fluorophenoxy)propyl, 4-(3- bromophenoxy)butyl, l,l-dimethyl-2-(4-iodophenoxy)ethyl,
• Phenoxy-lower alkyl group which may have, on the phenyl ring, 1-3 substituents selected from the group consisting of halogen atoms and lower alkoxy groups
• phenoxy-lower alkyl groups each having, on the phenyl ring, 1-3 substituents selected from the group consisting of halogen atoms and lower alkoxy groups but also by phenoxyalkyl groups which may each have, on the phenyl ring, 1-3 substituents selected from the group consisting of C ⁇ - 6 straight- or branched-chain alkoxy groups and halogen atoms in which the lower alkyl moiety is a C ⁇ _ 6 straight- or branched-chain alkyl group, such as phenoxymethyl, 2-phenoxyethyl, 1-phenoxyethyl, 3- phenoxypropyl, 4-phenoxybutyl, l,l-dimethyl-2-phenoxy- ethyl, 5-
• the process shown by the above Reaction formula-1 is carried out by reacting a carbostyril derivative represented by general formula (2) or a compound obtained by activating the carboxyl group of said derivative, with an amine represented by general formula (3) or a compound obtained by activating the amino group of said amine, according to an ordinary amido-bond formation reaction.
• a carbostyril derivative represented by general formula (2) or a compound obtained by activating the carboxyl group of said derivative with an amine represented by general formula (3) or a compound obtained by activating the amino group of said amine, according to an ordinary amido-bond formation reaction.
• an amine represented by general formula (3) or a compound obtained by activating the amino group of said amine according to an ordinary amido-bond formation reaction.
• the known conditions used in amido-bond formation reaction can be employed easily.
• the process includes, for example, (a) a mixed acid anhydride process which comprises reacting a carbostyril derivative (2) with an alkylhalocarboxylic acid to form a mixed acid anhydride and reacting the anhydride with an amine (3); (b) an active ester process which comprises converting a carbostyril derivative (2) into an active ester such as p-nitrophenyl ester, N-hydroxysuccinimide ester, 1- hydroxybenzotriazole ester or the like and reacting the active ester with an amine (3); (c) a carbodiimide process which comprises subjecting a carbostyril deriva ⁇ tive (2) and an amine (3) to a condensation reaction in the presence of an activating agent such as dicyclo- hexylcarbodiimide, carbonyldiimidazole or the like; and (d) other processes.
• a mixed acid anhydride process which comprises reacting a carbostyril derivative (2) with an alkylhalocar
• the other processes (d) include, for example, a process which comprises converting a carbostyril derivative (2) into a carboxylic acid anhydride using a dehydrating agent such as acetic anhydride or the like and reacting the carboxylic acid anhydride with an amine (3); a process which comprises reacting an ester of a carbostyril derivative (2) and a lower alcohol with an amine (3) at a high pressure at a high temperature; and a process which comprises reacting an acid halide of a carbostyril derivative (2), i.e. a carboxylic acid halide with an amine (3).
• a process which comprises activating a carbostyril derivative (2) with a phosphorus compound such as triphenylphosphine, diethyl cyanophosphate, diethyl chlorophosphate or the like and reacting the resulting compound with an amine (3).
• a phosphorus compound such as triphenylphosphine, diethyl cyanophosphate, diethyl chlorophosphate or the like
• the mixed acid anhydride used in the mixed acid anhydride process (a) can be obtained by an ordinary Schotten-Baumann reaction.
• the anhydride is reacted with an amine (3) generally without being isolated, whereby a compound of general formula (1) can be produced.
• the Schotten-Baumann reaction is conducted in the presence of a basic compound.
• the basic compound is a compound conventionally used in the Schotten- Baumann reaction and includes, for example, organic bases such as triethylamine, trimethyl- amine, pyridine, N,N-dimethylaniline, N-methylmorpholine, 4-dimethyl- aminopyridine, l,5-diazabicyclo[4.3.0]nonene-5 (DBN), l,8-diazabicyclo[5.4.0]undecene-7 (DBU) , 1,4- diazabicyclo[2.2.2]octane (DABCO) and the like, and inorganic bases such as potassium carbonate, sodium carbonate, potassium hydrogencarbonate, sodium hydrogencarbonate and the like.
• organic bases such as triethylamine, trimethyl- amine, pyridine, N,N-dimethylaniline, N-methylmorpholine, 4-dimethyl- aminopyridine, l,5-diazabicyclo[4.3.0]nonene-5 (DBN), l
• the reaction is conducted generally at -20°C to 100°C, preferably at 0- 50°C, and the reaction time is 5 minutes to 10 hours, preferably 5 minutes to 2 hours.
• the reaction of the resulting mixed acid anhydride with an amine (3) is conducted generally at -20°C to 150°C, preferably at 10- 50°C, and the reaction time is 5 minutes to 10 hours, preferably 5 minutes to 5 hours.
• the mixed acid anhydride process (a) is conducted in an appropriate solvent or in the absence of any solvent.
• the solvent may be any solvent conventionally used in the mixed acid anhydride process, and can be exemplified by halogenated hydrocarbons such as methylene chloride, chloroform, dichloroethane and the like; aromatic hydrocarbons such as benzene, toluene, xylene and the like; ethers such as diethyl ether, tetrahydrofuran, dimethoxyethane and the like; esters such as methyl acetate, ethyl acetate and the like; and aprotic polar solvents such as N,N- dimethylformamide, dimethyl sulfoxide, hexamethyl- phosphoric triamide and the like.
• halogenated hydrocarbons such as methylene chloride, chloroform, dichloroethane and the like
• aromatic hydrocarbons such as benzene, toluene, xylene and the like
• ethers such as diethyl ether, tetrahydro
• the alkylhalo- carboxylic acid used in the mixed acid anhydride process (a) includes, for example, methyl chloroformate, methyl bromoformate, ethyl chloroformate, ethyl bromoformate and isobutyl chloroformate.
• the alkylhalocarboxylic acid is used in an amount of generally at least 1 mole, preferably about 1-2 moles per mole of the carbostyril derivative (2).
• the amine (3) is used in an amount of generally at least 1 mole, preferably about 1-2 moles per mole of the carbostyril derivative (2).
• the solvent are halogenated hydrocarbons such as methylene chloride, chloroform, dichloroethane and the like; aromatic hydrocarbons such as benzene, toluene, xylene and the like; ethers such as diethyl ether, tetrahydrofuran, dimethoxyethane and the like; esters such as methyl acetate, ethyl acetate and the like; and aprotic polar solvents such as N,N-dimethylformamide, dimethyl sulfoxide, hexamethylphosphoric triamide and the like.
• the reaction is conducted at 0-150°C, preferably at 10- 100°C and is complete in 5-30 hours.
• the former is used in an amount of generally at least 1 mole, preferably 1-2 moles per mole of the latter.
• the process which comprises reacting a carboxylic acid halide with an amine (3) [this is a process included in the other processes (d)], can be conducted in the presence of a dehydrohalogenating agent in an appropriate solvent.
• a dehydrohalogenat- ing agent an ordinary basic compound is used.
• the basic compound can be selected from various known basic compounds and can be exemplified by not only the basic compounds usable in the above Schotten-Baumann reaction but also sodium hydroxide, potassium hydroxide, sodium hydride, potassium hydride, silver carbonate and alcoholates (e.g. sodium ethylate and sodium ethylate). Further, an excess amount of amine (3) can also be used as dehydrohalogenating agent.
• the solvent can be exemplified by the solvents usable in the mixed acid anhydride process (a), alcohols (e.g.
• the proportions of the amine (3) and the carboxylic acid halide used are not particularly restricted and can be appropriately selected from a wide range, but the carboxylic acid halide is used in an amount of generally at least about 1 mole, preferably about 1-2 moles per mole of the amine (3).
• the reaction is conducted generally at about -30°C to 180°C, preferably at about 0-150°C and is complete generally in about 5 minutes to 30 hours.
• the carboxylic acid halide can be produced, for example, by reacting a carbostyril derivative (2) with a halogenating agent in the presence or absence of a solvent.
• the solvent may be any solvent which does not adversely affect the reaction, and includes, for example, aromatic hydro- carbons (e.g. benzene, toluene and xylene), halogenated hydrocarbons (e.g. chloroform, methylene chloride and carbon tetrachloride) , ethers (e.g. dioxane, tetra ⁇ hydrofuran and diethyl ether), dimethylformamide, dimethyl sulfoxide and mixtures thereof.
• aromatic hydro- carbons e.g. benzene, toluene and xylene
• halogenated hydrocarbons e.g. chloroform, methylene chloride and carbon tetrachloride
• ethers e.g. dioxane, tetra ⁇
• the halogenat- ing agent may be an ordinary halogenating agent used for converting the hydroxyl group of carboxyl group into a halogen atom, and can be exemplified by thionyl chlo- ride, phosphorus oxychloride, phosphorus oxybromide, phosphorus pentachloride and phosphorus pentabromide.
• the proportions of the carbostyril derivative (2) and the halogenating agent used are not particularly rest ⁇ ricted and can be appropriately selected.
• the latter is used generally in large excess of the former when the reaction is conducted in the absence of any solvent, and in an amount of generally at least about 1 mole, prefer ⁇ ably 2-4 moles per mole of the former when the reaction is conducted in a solvent.
• the reaction temperature and reaction time are not particularly restricted, either. However, the reaction temperature is generally about room temperature to 100°C, preferably 50-100°C and the reaction time is about 30 minutes to 6 hours.
• the hydrolysis of the compound (B) is achieved by heating the compound (B) at 50-150°C, preferably at 70-120°C for about 0.5-24 hours in the presence of, for example, a hydrohalogenic acid (e.g. hydrochloric acid or hydrobromic acid), an inorganic acid (e.g. sulfuric acid or phosphoric acid), an alkali metal hydroxide (e.g. potassium hydroxide or sodium hydroxide), an inorganic alkali compound (e.g. sodium carbonate, potassium carbonate or potassium hydrogencarbonate) , or an organic acid (e.g. acetic acid).
• a hydrohalogenic acid e.g. hydrochloric acid or hydrobromic acid
• an inorganic acid e.g. sulfuric acid or phosphoric acid
• an alkali metal hydroxide e.g. potassium hydroxide or sodium hydroxide
• an inorganic alkali compound e.g. sodium carbonate, potassium carbonate or potassium hydrogencarbonate
• organic acid e.
• the reaction of the compound (B) with the phenyl-lower alcohol is conducted by reacting them in an appropriate solvent in the presence of a basic compound generally at 0-100°C, preferably at about 0-70°C for 1-5 hours.
• the desirable amount of the phenyl-lower alcohol used is at least 1 mole, preferably 1-2 moles per mole of the compound (B).
• the solvent and the basic compound can be any solvent and basic compound mentioned with respect to the process which comprises reacting a carboxylic acid halide with an amine (3).
• the sub ⁇ sequent reduction reaction is conducted under the same conditions as employed in (1) the catalytic reduction of a compound (le) in Reaction formula 3 to be described later.
• the process which comprises activating a carbostyril derivative (2) with a phosphorus compound such as triphenylphosphine, diethyl cyanophosphate, diethyl chlorophosphate, N,N-bis(2-oxo-3-oxazolidinyl)- phosphinic acid chloride or the like and reacting the resulting compound with an amine (3), can be conducted in an appropriate solvent.
• the solvent can be any solvent which does not adversely affect the reaction.
• halogenated hydrocarbons such as methylene chloride, chloroform, dichloroethane and the like
• aromatic hydrocarbons such as benzene, toluene, xylene and the like
• ethers such as diethyl ether, tetrahydrofuran, dimethoxyethane and the like
• esters such as methyl acetate, ethyl acetate and the like
• aprotic polar solvents such as N,N-dimethyl- formamide, dimethyl sulfoxide, hexamethylphosphoric triamide and the like.
• the amine (3) acts also as a basic compound, the use of the amine (3) in excess of the stoichiometric amount allows the reaction to proceed favorably.
• other basic compound for example, an organic base (e.g. triethylamine, trimethylamine, pyridine, N,N-dimethylaniline, N-methylmorpholine, DBN, DBU or DABCO) or an inorganic base (e.g. potassium carbonate, sodium carbonate, potassium hydrogencarbonate or sodium hydrogencarbonate).
• the reaction is conducted at about 0-150°C, preferably at about 0-100°C and is complete in about 10 minutes to 30 hours.
• the phosphorus compound and the amine (3) are used each in an amount of generally at least about 1 mole, preferably 1-3 moles per mole of the carbostyril derivative (2).
• R 1 , R , R 4 and the carbon-carbon bond between 3- and 4-positions in the carbostyril skeleton are the same as defined above;
• R3' is the same as the above- mentioned R 3 but excludes a case that it is a hydrogen atom;
• R5 represents a hydrogen atom or a lower alkyl group;
• R 6 represents a hydrogen atom, a lower alkyl group, a phenyl group, a phenyl-lower alkyl group, a phenylthio-lower alkyl group or a phenoxy-lower alkyl group which may have, on the phenyl ring, 1-3 substituents selected from the group consisting of halogen atoms and lower alkoxy groups;
• X 1 represents a halogen atom, a lower alkanesulfonyloxy group, an arylsulfonyloxy group or an aralkylsulfonyloxy group.
• halogen atom represented by x are chlorine, fluorine, bromine and iodine atoms
• specific examples of the lower alkanesulfonyloxy group are methanesulfonyloxy, ethanesulfonyloxy, propanesulfonyloxy, isopropane- sulfonyloxy, butanesulfonyloxy, tert-butanesulfonyloxy, pentanesulfonyloxy and hexanesulfonyloxy
• specific examples of the arylsulfonyloxy group are substituted or unsubstituted arylsulfonyloxy groups such as phenyl- sulfonyloxy, 4-methylphenylsulfonyloxy, 2-methylphenyl- sulfonyloxy, 4-nitrophenylsulfonyloxy, 4-methoxyphenyl
• reaction of the compound of general formula (lb) with the compound of general formula (4) can be carried out using the same procedure and I conditions as employed in the above-mentioned process which comprises reacting a carboxylic acid halide with an amine (3).
• an alkali metal halide such as sodium iodide, potassium iodide or the like.
• the reaction of the compound of general formula (lb) with the compound of general formula (5) is conducted in the presence of an appropriate solvent or in the absence of any solvent, in the presence of a re- ducing agent.
• the solvent can be exemplified by water; alcohols such as methanol, ethanol, isopropanol and the like; acetic acid; ethers such as dioxane, tetrahydro ⁇ furan, diethyl ether, diglyme and the like; aromatic hydrocarbons such as benzene, toluene, xylene and the like; and mixtures thereof.
• the reduction method usable includes, for example, a method of using, as a reducing agent, formic acid or a hydride such as sodium boron hydride, sodium cyanoboron hydride, lithium aluminum hydride or the like, and a catalytic reduction method of using a catalytic reduction catalyst such as palladium black, palladium-carbon, platinum oxide, platinum black, Raney nickel or the like.
• a reducing agent such as sodium boron hydride, sodium cyanoboron hydride, lithium aluminum hydride or the like
• a catalytic reduction method of using a catalytic reduction catalyst such as palladium black, palladium-carbon, platinum oxide, platinum black, Raney nickel or the like.
• formic acid is used as a reducing agent
• the reaction is conducted generally at room temperature to 200°C, preferably at about 50-150°C and is complete in about 1-10 hours.
• the desirable amount of formic acid used is a large excess over the compound of general formula (lb).
• a hydride When a hydride is used as a reducing agent, the reaction is conducted generally at -30°C to 100°C, preferably at about 0-70°C and is complete in about 30 minutes to 12 hours.
• the desirable amount of the hydride used is generally 1-20 moles, preferably 1-5 moles per mole of the compound of general formula (lb).
• a solvent such as ether (e.g. dioxane, tetrahydrofuran, diethyl ether or diglyme), aromatic hydrocarbon (e.g. benzene, toluene or xylene) or the like.
• the reaction is conducted in a hydrogen atmosphere of gener ⁇ ally normal pressure to 20 atm. , preferably normal pres ⁇ sure to 10 atm. generally at -30°C to 100°C, preferably at 0-60°C.
• the desirable amount of the catalyst used is generally 0.1-40% by weight, preferably 1-20% by weight based on the compound of general formula (lb).
• the desirable amount of the compound (5) used is generally at least equimolar, preferably equimolar to a large excess over the compound of general formula (lb).
• Rl R 2 , R3, ⁇ i and the carbon-carbon bond between 3- and 4-positions in the carbostyril skeleton are the same as defined above;
• R 7 represents a phenyl- lower alkyl group; and
• R ⁇ represents a phenyl group or a phenyl-lower alkyl group
• the reduction of the compound (le) is conducted, for example, (1) using a catalytic reduction catalyst in an appropriate solvent, or (2) using, as a reducing agent, a mixture between a metal or a metal salt and an acid, or between a metal or a metal salt and an alkali metal hydroxide, a sulfide, an ammonium salt or the like in an appropriate inert solvent.
• the solvent includes, water; acetic acid; alcohols such as methanol, ethanol, isopropanol and the like; hydrocarbons such as hexane, cyclohexane and the like; ethers such as dioxane, tetrahydrofuran, diethyl ether, diethylene glycol dimethyl ether and the like; esters such as ethyl acetate, methyl acetate and the like; aprotic polar solvents such as N,N-dimethyl- formamide and the like; and mixed solvents thereof.
• the catalytic reduction catalyst includes, for example, palladium, palladium black, palladium-carbon, platinum, platinum oxide and Raney nickel.
• the desirable amount of the catalyst used is generally about 0.02-1 time the amount of the starting material.
• the reaction tempera ⁇ ture is generally about -20°C to 150°C, preferably about 0-100°C, and the hydrogen pressure is generally 1-10 atm.
• the reaction is complete generally in about 0.5-10 hours.
• An acid such as hydrochloric acid or the like may be added in the reaction.
• the reducing agent includes, for example, a mixture between iron, zinc, tin or stannous chloride and an acid (e.g.
• hydrochloric acid or sulfuric acid and a mixture between iron, ferrous sulfate, zinc or tin and an alkali metal hydroxide (e.g. sodium hydroxide), a sulfide (e.g. ammonium sulfide), ammonia water or an ammonium salt (e.g. ammonium chloride).
• alkali metal hydroxide e.g. sodium hydroxide
• a sulfide e.g. ammonium sulfide
• ammonia water or an ammonium salt e.g. ammonium chloride
• the solvent can be exemplified by water, acetic acid, methanol, ethanol and dioxane.
• the conditions for reduction can be appropriately selected depending upon the type of the reducing agent used.
• the reaction can be conducted favorably by employing a reaction temperature of about 0°C to room temperature and a reaction time of about 0.5-10 hours.
• the reducing agent is used in an amount of at least 1 mole, generally 1-5 moles per mole of the starting material compound.
• the reaction of the compound of general formula (lf) with the compound of general formula (6) is conducted in the absence of any solvent or in the presence of an appropriate solvent, in the presence or absence of a dehydrating agent.
• the solvent includes, for example, alcohols such as methanol, ethanol, isopropanol and the like; aromatic hydrocarbons such as benzene, toluene, xylene and the like; halogenated hydrocarbons such as dichloromethane, dichloroethane, chloroform, carbon tetrachloride and the like; aprotic polar solvents such as N,N-dimethylformamide, N,N- dimethylacetamide, N-methylpyrrolidone and the like; and mixed solvents thereof.
• alcohols such as methanol, ethanol, isopropanol and the like
• aromatic hydrocarbons such as benzene, toluene, xylene and the like
• halogenated hydrocarbons such as dichloromethane, dichloroethane, chloroform, carbon tetrachloride and the like
• aprotic polar solvents such as N,N-dimethylformamide, N,N- dimethyl
• the dehydrating agent includes, for example, drying agents conventionally used for drying of solvents, such as molecular sieve and the like; mineral acids such as hydrochloric acid, sulfuric acid and the like; Lewis acids such as boron trifluoride and the like; and organic acids such as p-toluene- sulfonic acid and the like.
• the reaction is conducted generally at room temperature to 250°C, preferably at about 50-200°C and is complete generally in about 1-48 hours.
• the amount of the compound of general formula (6) used is not particularly restricted but desirably is generally at least equimolar, preferably equimolar to a large excess over the compound of general formula (If).
• the desirable amount of the dehydrating agent used is generally a large excess when a drying agent is used, and is a catalytic amount when an acid is used.
• the reaction of the compound (lf) with the compound (6) produces a Schiff base as an intermediate.
• the intermediate is reduced to convert into a compound (lg).
• a method using a hydride as a reducing agent is preferably used.
• the hydride includes, for example, lithium aluminum hydride, sodium boron hydride and diborane.
• the amount of the hydride used is generally at least 1 mole, preferably 1-10 moles per mole of the compound (If).
• the reduction is conducted generally using an appropriate solvent such as water, lower alcohol (e.g.
• ether e.g. tetrahydrofuran, diethyl ether or diglyme
• anhydrous solvent such as diethyl ether, tetrahydrofuran, diglyme or the like.
• reaction of the compound (lf) with the compound (7) is conducted under the same conditions as employed in the reaction of the compound (lb) with the compound (4) in the Reaction formula-2.
• reaction of the compound of general formula (lh) with the compound of general formula (8) is desirably conducted, for example, in the presence of a basic compound in an appropriate solvent.
• the basic compound includes, for example, sodium hydride, potassium, sodium, sodium amide and potassium amide.
• the solvent includes, for example, ethers such as dioxane, diethylene glycol dimethyl ether and the like; aromatic hydrocarbons such as toluene, xylene and the like; N,N-dimethylformamide; dimethyl sulfoxide; and hexamethylphosphoric triamide.
• ethers such as dioxane, diethylene glycol dimethyl ether and the like
• aromatic hydrocarbons such as toluene, xylene and the like
• N,N-dimethylformamide dimethyl sulfoxide
• hexamethylphosphoric triamide hexamethylphosphoric triamide.
• the proportions of the compound (lh) and the compound (8) are not particularly restricted and can be appropriately selected from a wide range. Desirably, however, the latter is used in an amount of at least about 1 mole, preferably about 1-5 moles per mole of the former.
• the reaction is conducted generally at about 0-70°C, preferably at about 0°C to
• the dehydrogenation of the compound of general formula (lj) is conducted in an appropriate solvent using a dehydrogenating agent.
• the dehydrogenating agent includes, for example, benzoquinones such as 2,3- dichloro-5,6-dicyanobenzoquinone, chloranil (2,3,5,6- tetrachlorobenzoquinone) and the like; halogenating agents such as N-bromosuccin- imide, N-chloro- succinimide, bromine and the like; selenium dioxide; palladium-carbon; palladium black; palladium oxide; and Raney nickel.
• the amount of the halogenating agent used is not particularly restricted and can be appropriately selected from a wide range, but is generally 1-5 moles, preferably 1-2 moles per mole of the compound (lj). It desirably is an ordinary catalytic amount when palladiumcarbon, palladium black, palladium oxide, Raney nickel or the like is used.
• the solvent can be exemplified by ethers such as dioxane, tetrahydrofuran, methoxyethanol, dimethoxymethane and the like; aromatic hydrocarbons such as benzene, toluene, xylene, cumene and the like; halogenated hydrocarbons such as dichloromethane, dichloroethane, chloroform, carbon tetrachloride and the like; alcohols such as butanol, amyl alcohol, hexanol and the like; protic polar solvents such as acetic acid and the like; and aprotic polar solvents such as dimethylformamide, dimethyl sulfoxide, hexamethylphosphoric triamide and the like.
• ethers such as dioxane, tetrahydrofuran, methoxyethanol, dimethoxymethane and the like
• aromatic hydrocarbons such as benzene, toluene, xylene, cumene
• the reaction is conducted generally at about room temperature to 300°C, preferably at room temperature to 200°C and is complete generally in about 1-40 hours.
• a catalytic amount of a peracid anhydride such as benzoyl peroxide or the like may be added to the reaction system.
• the reduction of the compound of general formula (Ik) is conducted under the same conditions as used in ordinary catalytic reductions.
• the catalyst used can be exemplified by metals such as palladium, palladium-carbon, platinum, Raney nickel and the like. These metals are used in an ordinary catalytic amount.
• the solvent used includes, for example, methanol, ethanol, isopropanol, dioxane, tetrahydrofuran, hexane, cyclohexane, acetic acid and ethyl acetate.
• the reduction may be conducted at normal pressure or under pressure but is desirably conducted generally at normal pressure to 20 kg/cm 2 , preferably at normal pressure to 10 kg/cm 2 .
• the reaction temperature is generally about 0-150°C, preferably room temperature to 100°C.
• the compound (2) which is a starting material for the compound (1), can be produced, for example, by processes represented by the following Reaction formulas -7 to -15.
• Rl, R 4 , X and the carbon-carbon bond between 3- and 4-positions in the carbostyril skeleton are the same as defined above; R 9 represents a nitrogen- containing heterocycle residue; and Rio represents a lower alkyl group) .
• the reaction of the compound (9) with the nitrogen-containing heterocycle residue (10) is conducted in an appropriate solvent or in the absence of any solvent.
• the solvent can be any inert solvent which does not adversely affect the reaction. It includes, for example, halogenated solvents such as chloroform, methylene chloride, dichloroethane, carbon tetrachloride and the like; ethers such as diethyl ether, tetrahydrofuran, dioxane, dimethoxyethane and the like; alcohols such as methanol, ethanol, isopropanol, butanol and the like; esters such as methyl acetate, ethyl acetate and the like; aprotic polar solvents such as N,N-dimethylformamide, dimethyl sulfoxide, hexamethylphosphoric triamide and the like; and acetonitrile.
• the nitrogen-containing heterocycle residue can be exemplified by pyridine and quinoline.
• the amount of the nitrogen-containing heterocycle residue used is at least equimolar, preferably a large excess over the compound (9).
• the reaction is conducted at 50-200°C, preferably at 70-150°C and is complete in about 0.5-10 hours.
• the hydrolysis of the resulting compound (11) is conducted by treating the compound (11) in water in the presence of an inorganic base such as sodium hydroxide, potassium hydroxide or the like at room temperature to 150°C for about 0.5-10 hours.
• the esterification of the compound (11) with the compound (12) is conducted by reacting them in the presence of a basic compound in the presence or absence of a solvent.
• the solvent can be exemplified by halogenated hydrocarbons such as methylene chloride, chloroform, dichloroethane and the like; aromatic hydrocarbons such as benzene, toluene, xylene and the like; ethers such as diethyl ether, tetrahydrofuran, dioxane, dimethoxyethane and the like; and aprotic polar solvents such as N,N-dimethylformamide, dimethyl sulfoxide, hexamethylphosphoric triamide and the like.
• halogenated hydrocarbons such as methylene chloride, chloroform, dichloroethane and the like
• aromatic hydrocarbons such as benzene, toluene, xylene and the like
• ethers such as diethyl ether, tetrahydrofuran, dioxane, dimethoxyethane and the like
• aprotic polar solvents such as N,N
• the basic compound can be exemplified by organic bases such as triethylamine, trimethylamine, pyridine, N,N- dimethylaniline, N-methylmorpholine, 4-dimethylamino- pyridine, l,5-diazabicyclo[4.3.0]nonene-5 (DBN), 1,5- diazabicyclo[5.4.0]undecene-5 (DBU) , 1,4-diazabicyclo- [2.2.2]octane (DABCO) and the like; and inorganic bases such as potassium carbonate, sodium carbonate, potassium hydrogencarbonate, sodium hydrogencarbonate and the like.
• organic bases such as triethylamine, trimethylamine, pyridine, N,N- dimethylaniline, N-methylmorpholine, 4-dimethylamino- pyridine, l,5-diazabicyclo[4.3.0]nonene-5 (DBN), 1,5- diazabicyclo[5.4.0]undecene-5 (
• the desirable amount of the basic compound used is at least 1 mole, preferably 1-1.5 moles per mole of the compound of general formula (11).
• the amount of the compound (12) used is at least equimolar, generally a large excess over the compound of general formula (11).
• the reaction is conducted generally at room temperature to 150°C, preferably at about 50-100°C and is complete generally in 30 minutes to 10 hours.
• the hydrolysis of the compound (2b) is desirably conducted in the presence of an acid or a basic compound in water, an alcohol (e.g. ethanol, methanol or propanol) or a mixed solvent thereof.
• the acid can be exemplified by mineral acids such as hydrochloric acid, sulfuric acid and the like
• the basic compound can be exemplified by potassium carbonate, sodium carbonate, sodium hydrogencarbonate, sodium hydroxide and potassium hydroxide.
• the amount of the acid or basic compound used is generally a large excess over the compound of general formula (2b), preferably 1-5 moles per mole of the compound (2b).
• the reaction is conducted generally at room temperature to 200°C, preferably at about room temperature to 150°C and is complete generally in about 1 hour to 4 days.
• R 3 and Rl 4 each represent a lower alkyl group
• R 4 may bond to A and, in the starting materials, R 4 may bond to the benzene ring of the compound (12) or to A of the compound (13)].
• the reaction of the compound (12) with the compound (13) is conducted under the same conditions as employed in the reaction of the compound (2) with the compound (3) in the Reaction formula-1.
• the cyclization of the compound of general formula (14) is conducted in the presence of an acid in the absence of any solvent or in the presence of an appropriate solvent.
• the acid is not particularly restricted and can be an ordinary inorganic or organic acid.
• the acid are inorganic acids such as hydrochloric acid, hydrobromic acid, sulfuric acid and the like; Lewis acids such as aluminum chloride, boron trifluoride, titanium tetrachloride and the like; and organic acids such as formic acid, acetic acid, ethanesulfonic acid, p-toluenesulfonic acid and the like.
• inorganic acids such as hydrochloric acid, hydrobromic acid, sulfuric acid and the like
• Lewis acids such as aluminum chloride, boron trifluoride, titanium tetrachloride and the like
• organic acids such as formic acid, acetic acid, ethanesulfonic acid, p-toluenesulfonic acid and the like.
• hydrochloric acid, hydrobromic acid and sulfuric acid are preferable.
• the desirable amount of the acid used is generally at least equal to the weight of the compound of general formula (14), preferably 5-50 times said weight.
• the solvent can be any ordinary
• ethers e.g. dioxane and tetrahydrofuran
• aromatic hydrocarbons e.g. benzene, chlorobenzene and toluene
• halogenated hydrocarbons e.g. methylene chloride, chloroform and carbon tetrachloride
• acetone dimethyl sulfoxide, dimethylformamide and hexamethyl- phosphoric triamide.
• a compound of general formula (15) wherein Rll is a carbamoyl group can be converted to a compound of general formula (15) wherein Rll is a carboxyl group, by hydrolyzing the former under the same conditions as employed in the hydrolysis of the compound (2b) in the Reaction formula-7.
• R 4 is the same as defined above; and R i2 represents a lower alkoxycarbonyl group
• the reaction for converting the compound (16) into a compound (17) can be conducted in the presence of a basic compound in an appropriate solvent.
• the basic compound can be a wide range of compounds such as inorganic bases (e.g. sodium hydroxide, potassium carbonate, sodium hydrogencarbonate, potassium hydrogencarbonate, sodium hydride, sodium methylate and sodium ethylate), amines (e.g. triethylamine, pyridine, ⁇ -picoline, N,N-dimethylaniline, N-methylmorpholine, piperidine and pyrrolidine) and the like.
• inorganic bases e.g. sodium hydroxide, potassium carbonate, sodium hydrogencarbonate, potassium hydrogencarbonate, sodium hydride, sodium methylate and sodium ethylate
• amines e.g. triethylamine, pyridine, ⁇ -picoline, N,N-dimethylaniline, N-methylmorpholine, piperidine and pyrrolidine
• the solvent includes ethers such as dioxane, tetrahydofuran, glyme, diglyme and the like; aromatic hydrocarbons such as toluene, xylene and the like; lower alcohols such as methanol, ethanol, isopropanol and the like; and polar solvents such as dimethylformamide, dimethyl sulfoxide and the like.
• ethers such as dioxane, tetrahydofuran, glyme, diglyme and the like
• aromatic hydrocarbons such as toluene, xylene and the like
• lower alcohols such as methanol, ethanol, isopropanol and the like
• polar solvents such as dimethylformamide, dimethyl sulfoxide and the like.
• the reaction for converting the compound (18) into a compound (19) by ring closure is conducted in the presence of an N,N- substituted formamide and an acid catalyst (the combination of these two reagents are generally called "Vilsmeier reagent") in an appropriate solvent or in the absence of any solvent.
• the N,N-substituted formamide can be exemplified by N,N-di- methylformamide, N,N- diethylformamide, N-methyl-N-ethylformamide and N- methyl-N-phenylformamide.
• the acid catalyst can be exemplified by phosphorus oxychloride, thionyl chloride and phosgene.
• the solvent can be exemplified by halogenated hydrocarbons such as chloroform, 1,2- dichloroethane, 1,2-dichloroethylene and the like, and aromatic hydrocarbons such as chlorobenzene, 1,2- dichlorobenzene and the like.
• the desirable amounts of the N,N-substituted formamide and acid catalyst used are generally each a large excess over the compound of general formula (18), preferably 2-5 moles (the N,N- substituted formamide) and 5-10 moles (the acid catalyst) per mole of the compound (18).
• the reaction is desirably conducted generally at 0-150°C, preferably at about 50-100°C and is complete in about 3-24 hours.
• the reaction for converting the compound (19) into a compound (20) is conducted under the same conditions as employed in the hydrolysis of the compound (B) in the process of the Reaction formula-1.
• the oxidation of the compound of general formula (20) is carried out in the presence of an appropriate oxidizing agent in a solvent.
• the oxidizing agent can be exemplified by metal salts such as chromium trioxide, sodium bichromate, potassium permanganate, silver oxide and the like; peracids such as hydrogen peroxide, peracetic acid, trifluoroperacetic acid, perbenzoic acid, m-chloroperbenzoic acid and the like; and mineral acids such as nitric acid and the like.
• metal salts such as chromium trioxide, sodium bichromate, potassium permanganate, silver oxide and the like
• peracids such as hydrogen peroxide, peracetic acid, trifluoroperacetic acid, perbenzoic acid, m-chloroperbenzoic acid and the like
• mineral acids such as nitric acid and the like.
• the solvent can be exemplified by water; alcohols such as methanol, ethanol, propanol, butanol, tert-butanol and the like; ethers such as diethyl ether, tetrahydrofuran and the like; aromatic hydrocarbons such as benzene, toluene, xylene and the like; acetone; pyridine; acetic acid; and mixed solvents of two or more of the above.
• a metal salt is used as the oxidizing agent
• the reaction can be allowed to proceed favorably by using, as a catalyst, a base such as sodium hydroxide, potassium hydroxide and the like or an acid such as sulfuric acid and the like.
• the desirable amount of the oxidizing agent used is generally a large excess over the compound of general formula (20).
• the reaction is conducted generally at 0-150°C, preferably at about room temperature to 100°C for about 1-10 hours. [Reaction formula-11]
• reaction of the compound (21) with the compound (22) can be conducted in the presence of a basic compound in an appropriate solvent.
• the basic compound and the solvent can be any basic compound and any solvent both used in the reaction for converting the compound (16) into a compound (17) in the Reaction formula-9.
• the reaction is conducted at room tempera ⁇ ture to 150°C, preferably at 60-120°C for about 1-24 hours.
• the proportions of the compound (21) and the compound (22) are not particularly restricted, but the latter is used in an amount of generally at equimolar to a large excess, preferably 1-5 moles per mole of the former. [Reaction formula-12]
• R 4 is the same as defined above, and R i5 represents a lower alkyl group
• a compound (23) is reacted with R15COX or (Ri5C0) 2 0 (Ri5 and X are the same as defined above) to obtain a compound (24), and the compound (24) is hydrolyzed to obtain a compound (2f).
• the reaction of the compound (23) with R15C0X or (Ri5CO) 2 ⁇ is conducted in the presence or absence of a basic compound.
• the basic compound can be exemplified by alkali metals such as metallic sodium, metallic potassium and the like; hydroxides, carbonates and bicarbonates of said alkali metals; and amine compounds such as pyridine, piperidine and the like.
• the reaction proceeds in the presence or absence of a solvent.
• the solvent includes, for example, ketones such as acetone, methyl ethyl ketone and the like; ethers such as diethyl ether, dioxane and the like; aromatic hydrocarbons such as benzene, toluene, xylene and the like; water; and pyridine.
• the amount of R15COX or (Ri5C0) 2 0 used is at least equimolar, generally equimolar to a large excess over the compound of general formula (23).
• the reaction proceeds at 0-200°C, but is preferably conducted generally at 0-150°C.
• the reaction time is about 0.5-10 hours.
• the hydrolysis of the compound of general formula (24) is conducted by heating the compound in an aqueous solution in the presence of an inorganic basic compound such as potassium hydroxide, sodium hydroxide, sodium carbonate, potassium carbonate, sodium hydrogencarbonate or the like generally at 50-150°C, preferably at 70-100°C for about 0.5-10 hours.
• an inorganic basic compound such as potassium hydroxide, sodium hydroxide, sodium carbonate, potassium carbonate, sodium hydrogencarbonate or the like generally at 50-150°C, preferably at 70-100°C for about 0.5-10 hours.
• a compound (2h) or (2i) wherein RI 3 is a lower alkyl group can be converted into a compound (2h) or (2i) wherein R 3 is a hydrogen atom, by hydrolysis under the same conditions as employed in the hydrolysis of the compound (2b) in the Reaction formula-7.
• a compound (2h) or (2i) wherein R 3 is a hydrogen atom, can be converted into a compound (2h) or
• Ri3 is a lower alkyl group, by esterification.
• This esterification can be conducted, for example, by reacting a starting material compound with an alcohol such as methanol, ethanol, isopropanol or the like in the presence of an acid (e.g. hydrochloric acid or sulfuric acid) or a halogenating agent (e.g. thionyl chloride, phosphorus oxychloride, phosphorus pentachloride or phosphorus trichloride) generally at 0- 150°C, preferably at 50-100°C for about 1-10 hours.
• an acid e.g. hydrochloric acid or sulfuric acid
• a halogenating agent e.g. thionyl chloride, phosphorus oxychloride, phosphorus pentachloride or phosphorus trichloride
• the nitration of the compound (2j) is conducted, for example, in the absence of any solvent or in an appropriate inert solvent using a nitrating agent under the same conditions as ordinarily employed in nitration of aromatic compounds.
• the inert solvent can be exemplified by acetic acid, acetic anhydride and concentrated sulfuric acid.
• the nitrating agent can be exemplified by fuming nitric acid, concentrated nitric acid, mixed acids (mixtures of sulfuric acid, fuming sulfuric acid, phosphoric acid or acetic anhydride and nitric acid) and combinations of an alkali metal nitrate (e.g. potassium nitrate or sodium nitrate) and sulfuric acid.
• the amount of the nitrating agent used is at least equimolar, generally an excess over the starting material compound.
• the reaction is carried out generally at about -30°C to room temperature for 5 minutes to 4 hours.
• the compound (9), which is used as a starting material in the Reaction formula-7, can be produced, for example, by a process of the following Reaction formula-16.
• the reaction of the compound of general formula (25) with the compound of general formula (26) or (27), which is generally called “Friedel-Crafts reaction”, is conducted in a solvent in the presence of a Lewis acid.
• a Lewis acid there can be favorably used those generally used in this type of reaction.
• the solvent can be exemplified by carbon disulfide, nitrobenzene, chlorobenzene, dichloromethane, dichloroethane, trichloroethane and tetrachloroethane.
• the Lewis acid there are preferably used those conventionally used.
• the amount of the Lewis acid used may be determined appropriately but is generally about 2-6 moles per mole of the compound of general formula (25).
• the amount of the compound of general formula (26) or (27) is generally at least about 1 mole, preferably 1-5 moles per mole of the compound of general formula (25).
• the reaction temperature may be appropriately selected but generally is about 20-120°C, preferably about 40-70°C.
• the reaction time varies depending upon the starting material, catalyst, reaction temperature, etc. used but generally about 0.5-24 hours.
• the carbostyril derivatives represented by general formula (1) according to the present invention can each form an acid addition salt easily by being reacted with a pharmacologically acceptable acid.
• the acid can be exemplified by inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, hydrobromic acid and the like, and organic acids such as oxalic acid, maleic acid, fumaric acid, malic acid, tartaric acid, citric acid, benzoic acid and the like.
• those having an acidic group can each form a salt easily by being reacted with a pharmacologically acceptable basic compound.
• the basic compound can be exemplified by sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium carbonate and potassium hydrogen carbonate.
• Each of the intended compounds obtained by the above reaction formulas can be easily separated from the reaction system and purified by ordinary means.
• the means for separation can be exemplified by solvent ex ⁇ traction, dilution, recrystallization, column chromato ⁇ graphy and preparative thin-layer chromatography.
• the present carbostyril derivatives of general formula (1) include optical isomers.
• Each of the compounds of general formula (1) is used generally in the form of ordinary pharmaceutical preparation.
• the pharmaceutical preparation is prepared by using diluents or excipients ordinarily used, such as filler, bulking agent, binder, humectant, disinteg ⁇ rator, surfactant, lubricant and the like.
• the pharmaceutical preparation can be prepared in various forms depending upon the purpose of remedy, and the typical forms include tablets, pills, a powder, a solution, a suspension, an emulsion, granules, an oint ⁇ ment, suppositories, an injection (e.g. solution or suspension), etc.
• excipients such as lactose, white sugar, sodium chloride, glucose, urea, starch, calcium carbonate, kaolin, crystalline cellu ⁇ lose, silicic acid and the like; binders such as water, ethanol, propanol, simple syrup, lactose solution, starch solution, gelatin solution, carboxymethyl cellu ⁇ lose, shellac, methyl cellulose, potassum phosphate, polyvinylpyrrolidone and the like; disintegrators such as dry starch, sodium alginate, powdered agar, powdered laminarin, sodium hydrogencarbonate, calcium carbonate, polyoxyethylene sorbitan-fatty acid esters, sodium lauryl sulfate, stearic acid monoglyceride, starch, lactose and the like; disintegration inhibitors such as white sugar, stearin, cacao butter, hydrogenated oil and the like; absorption promoters such as quatern
• the tablets can be prepared, as necessary, in the form of ordinary coated tablets, such as sugar- coated tablets, gelatin-coated tablets, enteric coated tablets or film-coated tablets, or in the form of double-layered tablets or multi-layered tablets.
• various carriers exemplified by excipients such as glucose, lactose, starch, cacao butter, hardened vegetable oils, kaolin, talc and the like; binders such as powdered acacia, powdered tragacanth, gelatin, ethanol and the like; and disintegrators such as laminarin, agar and the like.
• suppositories there can be used carriers exemplified by a polyethylene glycol, cacao butter, a higher alcohol, a higher alcohol ester, gelatin and a semisynthetic glyceride.
• Capsules can be prepared generally by mixing the present compound with various carriers mentioned above and filling the mixture into a hard gelatin capsule or a soft capsule according to an ordinary method.
• an injection solution, emulsion or suspension
• it is sterilized and is prefer ⁇ ably made isotonic to the blood.
• diluents such as water, ethyl alcohol, polyethylene glycol, pro- pylene glycol, ethoxylated isostearyl alcohol, polyoxy- isostearyl alcohol and polyoxyethylene sorbitanfatty acid esters.
• the injection may contain sodium chloride, glucose or glycerine in an amount sufficient to make the injection isotonic, and may further contain a solubilizing agent, a buffer solution, a soothing agent, etc. all ordinarily used.
• the pharmaceutical preparation may furthermore contain, as necessary, a coloring agent, a preservative, a perfume, a flavoring agent, a sweetening agent and other drugs.
• diluents such as white petrolatum, paraffin, glycerin, cellulose derivatives, polyethylene glycol, silicon, bentonite and the like.
• the amount of the present compound to be con ⁇ tained in the pharmaceutical preparation of the present invention is not particularly restricted and can be appropriately selected from a wide range, but the desir ⁇ able amount is generally 1-70% by weight, preferably 1-30% by weight in the pharmaceutical preparation.
• the method for administering the pharmaceuti- cal preparation is not particularly restricted. It is decided depending upon the form of preparation, the age, distinction of sex and other conditions of patient, the disease condition of patient, etc. For example, tablets, pills, a solution, a suspension, an emulsion, granules or capsules are administered orally.
• An injection is intravenously administered singly or in admixture with an ordinary auxiliary solution of glucose, amino acids or the like, or, as necessary, is singly administered intramuscularly, intradermally, subcutaneously or intraperitoneally. Suppositories are administered intrarectally.
• the dose of the pharmaceutical preparation is appropriately selected depending upon the administration method, the age, distinction of sex and other conditions of patient, the disease condition of patient, etc., but the desirable dose is generally about 0.01-10 mg per kg of body weight per day in terms of the amount of the active ingredient, i.e. the present compound of general formula (1).
• the desirable content of the active ingredient in each unit of administration form is 0.1-200 mg.
• Polyethylene glycol (molecular weight: 4000) 0.3 g
• a suspension of 2.0 g of 4-carboxycarbostyril in 10 ml of thionyl chloride was heated to 80°C. There ⁇ to were added 2 g of dimethylformamide and 20 ml of chloroform. The mixture was refluxed for 2 hours by heating, to give rise to a reaction. After the comple ⁇ tion of the reaction, the reaction mixture was concent ⁇ rated under reduced pressure. The residue was mixed with n-hexane. The mixture was filtered to collect a white powder.
• a solution of 0.4 g of benzyl alcohol in 2 ml of dimethylformamide was dropwise added to a suspension of 150 mg of sodium hydride in 5 ml of dimethylformamide with ice-cooling. The mixture was stirred at the same temperature for 30 minutes. Thereto was dropwise added 1.0 g of 4- ⁇ 4-[N-methyl-N-(2-phenylethyl)amino]-l- piperidinyl)carbonyl-2-chloroquinoline in 2 ml of dimethylformamide. The mixture was stirred at room temperature for 1 hour to give rise to a reaction. The reaction mixture was poured into ice water, followed by extraction with methylene chloride.
• Reference Example 4 7.1 g of aluminum chloride was added to a solution of 2.5 g of 4-cinnamoylamino-3-methylbenzoic acid in 12.5 ml of chlorobenzene. The mixture was stirred at 90°C for 1 hour to give rise to a reaction. The reaction mixture was poured into ice water. The resulting precipitate was collected by filtration and dispersed in 70 ml of ethanol and 70 ml of water. The dispersion was made alkaline with a 30% aqueous sodium hydroxide solution and then treated with active carbon. The resulting material was made acidic with concentrated hydrochloric acid. The resulting precipitate was collected by filtration and then washed with hot ethanol to obtain 0.9 g of 6-carboxy-8-methylcarbostyril as a light brown powder.
• 6-chloroacetyl-8-ethyl-3,4- dihydrocarbostyril By using 6-chloroacetyl-8-ethyl-3,4- dihydrocarbostyril, there was obtained 6-carboxy-8- ethyl-3,4-dihydrocarbostyril as a light brown powder in the same manner as in Reference Example 6.
• 6-chloroacetyl-8-propylcarbostyril By using 6-chloroacetyl-8-propylcarbostyril, there was obtained 6-carboxy-8-propylcarbostyril as a light brown powder having a melting point of 300°C or higher.
• 6-chloroacetyl-8-isopropylcarbo- styril By using 6-chloroacetyl-8-isopropylcarbo- styril, there was obtained 6-carboxy-8-isopropyl- carbostyril as a light brown powder having a melting point of 300°C or higher.
• Reference Example 14 10 g of 8-ethyl-6-carboxy-3,4-dihydrocarbo- styril was gradually added to a solution of 4.2 g of sodium hydride in 50 ml of dimethylformamide with ice- cooling. The mixture was stirred at room temperature for 30 minutes. Thereto was dropwise added a solution of 9.0 ml of methyl iodide in 20 ml of dimethylformamide with ice-cooling. The mixture was stirred at room temperature overnight. The reaction mixture was poured into ice water. The resulting mixture was extracted with methylene chloride.
• the extract was washed with water and a saturated aqueous sodium chloride solution in this order, then dried with anhydrous magnesium sulfate and concentrated under reduced pressure to remove the solvent.
• N-bromosuccinimide 10.7 g of N-bromosuccinimide and a catalytic amount of benzoyl peroxide were added to a solution of 12 g of 8-nitro-6-methoxycarbonyl-3,4-dihydrocarbostyril in 200 ml of chloroform. The mixture was refluxed by heating, for 4 hours. Thereto was added an additional amount (5.0 g) of N-bromosuccinimide. The resulting mixture was refluxed by heating, for 1 hour. The re- action mixture was concentrated under reduced pressure. The residue was recrystallized from ethanol two times to obtain 7.1 g of 8-nitro-6-methoxycarbonylcarbostyril as light yellow needles.
• Reference Example 19 4.1 g of potassium carbonate was added to a solution of 2.0 g of 4-carbamoylaniline in 40 ml of acetone and 40 ml of water. To the mixture was gradually added 3.2 g of 2-methylcinnamoyl chloride with ice-cooling. The resulting mixture was stirred at room temperature overnight. The reaction mixture was mixed with water. The resulting precipitate was collected by filtration, washed with water and dried to obtain 3.2 g of N-(2-methylcinnamoyl)-4-carbamoylaniline as a white powder.
• Recrystallization solvent ethanol-water
• R4 8 - CH ⁇ CH 3
• Recrystallization solvent ethanol-water
• the extract was washed with water and a saturated aqueous sodium chloride solution in this order, dried with anhydrous magnesium sulfate and concentrated under reduced pressure to remove the solvent.
• the resulting material was treated with hydrochloric acid to convert into a hydrochloride.
• the hydrochloride was dissolved in ethanol.
• the solution was poured into excessive diethyl ether for solidification to obtain 1.1 g of 1- methyl-6- ⁇ 4-[ -methyl-N-(2-phenylethyl)amino]-1- piperidinylcarbonyl ⁇ carbostyril hydrochloride as a white powder.
• the resulting material was treated with hydrochloric acid to convert into a hydrochloride.
• the hydrochloride was crystallized from ethanol-diethyl ether to obtain 0.59 g of 6- ⁇ 4-[N-methyl-N-(2-phenylthioethyl)amino]-1-piperi- dinylcarbonyl ⁇ -3,4-dihydrocarbostyril hydrochloride as a white powder.
• a preparation for perfusing blood in femoral artery under a constant pressure was prepared as follows.
• a tracheal cannula was fitted to practise artificial respiration using an artificial respirator (a product of Shinano Seisakusho) , and pentobarbital sodium (4 mg/kg/hr) and heparin sodium (100 U/kg/hr) were continuously administered intravenously to maintain anesthesia and the anti- coagulation activity of blood.
• an artificial respirator a product of Shinano Seisakusho
• pentobarbital sodium (4 mg/kg/hr) and heparin sodium 100 U/kg/hr
• the amount of blood flow in femoral artery was measured in the perfusion circuit by the use of an electromagnetic blood flow meter (MFV-2100 manufactured by Nihon Koden) and reported on a thermal-pen type recorder (RECTI-HORIZ 8K manufactured by Nihon Denki Sanei) .
• MMV-2100 manufactured by Nihon Koden
• RECTI-HORIZ 8K manufactured by Nihon Denki Sanei
• test compounds shown below were dissolved in a solvent (purified water, hydrochloric acid, N,N-dimethylformamide) in a concentration of 10 ⁇ /ml. The solution was diluted as necessary and a volume of 10-30 ⁇ l was administered into the femoral artery of each dog.
• a solvent purified water, hydrochloric acid, N,N-dimethylformamide
• test results the amount of blood flow of test compound-administered group minus the amount of blood flow of control group (solvent alone-administered group) was reported as change in blood flow amount (ml/min) .
• control group solvent alone-administered group

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• Cardiology (AREA)
• Heart & Thoracic Surgery (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Plural Heterocyclic Compounds (AREA)

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• 1993
  • 1993-02-16 JP JP5026594A patent/JPH06239858A/ja active Pending
• 1994
  • 1994-02-03 WO PCT/JP1994/000157 patent/WO1994019339A1/en not_active Application Discontinuation
  • 1994-02-03 EP EP94905839A patent/EP0636128A1/en not_active Withdrawn
  • 1994-02-03 CN CN94190064A patent/CN1102527A/zh active Pending
  • 1994-02-03 AU AU59788/94A patent/AU666259B2/en not_active Ceased
  • 1994-02-03 CA CA002133207A patent/CA2133207A1/en not_active Abandoned
  • 1994-02-03 US US08/318,801 patent/US5591751A/en not_active Expired - Fee Related
  • 1994-02-04 TW TW083100952A patent/TW259789B/zh active
  • 1994-02-16 PH PH47776A patent/PH30979A/en unknown
  • 1994-10-15 KR KR1019940703696A patent/KR950700900A/ko active IP Right Grant

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